condition mean min max ZT0-3 0.6327569435 0.170394803 1.095119084 ZT4-7 0.92260679675 0.731012295 1.1142012985 ZT8-11 0.1941611805 0.1770552815 0.2112670795 ZT12-15 0.483969719 0.235306919 0.732632519 ZT16-19 1.94768971575 1.6470649475 2.248314484 ZT20-23 3.2919605052500005 3.0786191480000005 3.5053018625